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PAR Readings

Discussion in 'Picture Of The Month' started by kerstin, May 18, 2014.

  1. kerstin

    kerstin Secretary Staff Member

    So one benefit of having the meeting at my house was that we used the PAR meter to measure light levels in my tank...and what a shock! I realize light is a very important things where corals are concerned, and as you can see by values below, my PAR values seem to indicate why I am having little niggly issues with my corals in the tank.

    However, I will first be lowering my light closer to the water, and next working on upgrading my lights...and maybe my corals will not just look nice, but actually thrive...
     

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  2. billw

    billw Treasurer Staff Member

    Nice technique for documentation!
     
  3. kerstin

    kerstin Secretary Staff Member

    Thanks - Photoshop Elements...
     
  4. kerstin

    kerstin Secretary Staff Member

    So far I have removed the glass (since it's a single-ended but double MH bulb, no need for UV shielding from the glass).

    I have also lowered the light several inches. I am not really seeing major results - although my suffering Acans are still not happy...so we'll see how it goes.

    Crossing my fingers.
     
  5. billw

    billw Treasurer Staff Member

    Make sure you go slow and acclimate. You don't want to shock them.
     
  6. Rmcaum

    Rmcaum Director Staff Member

    Kerstin, I hope you don't mind if I join your thread, I had the PAR meter today and took some readings. I have three TMC aquaray 600 ultimas above my 29 standard. They are located about six inches from the surface of the water. Sand bed is about 16" under the water level. At one inch under the emmitter it read from 1300-1500 depending on which puck I was under. It went all the way down to 600 or so between the leds. At the surface I didn't get much variation until I got outside of the light spread, it was pretty consistant around 290-300. These lights are only 12 watt strips, I have a total of 36 watts in 21 emmitters. They are advertised as high PUR vs high PAR, I guess this is what they meant.
     

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  7. Rmcaum

    Rmcaum Director Staff Member

    So I got new lights and decided to give the new PAR readings. I went from the lights listed above, to a radion gen 3. One single light mounted 9 inches above the surface. I started them in acclimation mode starting at 50% of 75% brightness for five weeks. They have made it through that round and have started a new two week acclimation moving them up to 90%. There are so many settings on these things it is hard to tell you what channel of LEDs is at what percentage and such. I have the whites, reds and greens turned down significantly, around 50% I think. This picture is with the lights at 80% of the full intensity available with the mentioned channels turned down. With every thing at full, I was getting about 650 at the Monti and about 400 on the sand. I have noticed decrease growth rate with the new lights, but I would imagine that is due to the acclimation of the coral. I am trying to get them to 100% at some point, but I have noticed that most of my zoas are little smaller and my euphyllia are not opening as much (shorter polyp extension.) I am sure that I will keep playing with them for a while. One thing to be said about the old Aquaray lights is that they were plug and play as far as the spectrum goes. Anywho, here are the readings with about 100 watts total power.
     

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    Jilnifer likes this.
  8. killercl0wnfish

    killercl0wnfish Club Member

    93 cube 2 eco radions 3 pros that are a foot above the water at 85 %

    [​IMG]
     

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